B&B Electronics Zlinx 485 - Manual (Page 19)

Hardware
Manual Documentation Number: Zlinx485m-1808
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Figure 18.
Relay Wiring
The following diagram shows typical connection wiring for Relay outputs.
Figure 19. Typical Relay Output Wiring
Modbus Mode Configuration
The Zlinx 485 Base module can be configured to operate in Modbus Mode. In Modbus mode
messages are sent across the physical layer (wiring configuration) from the Zlinx 485 base to the
Modbus network.
To use Modbus mode successfully, an understanding of the Zlinx 485 memory map
assignments is necessary.
Modbus function codes supported:
Function 1: Read DO Status
Function 2: Read DI’s
Function 3: Read AO Status
Function 4: Read AI’s
Function 5: Write Single DO’s
Function 6: Write to Single AO
Function 15: Write to Multiple DO’s
Messages sent between Zlinx 485 and a Modbus node use Modbus memory addresses to
specify what type of information is being sent and where it is stored. In the Modbus
addressing scheme each type of I/O (DO, DI, AI and AO) is stored in a different section
of the memory.